Let's see how all this would work:
"Hello welcome on the stackexchange network (SEN for short). SEN features among other things a fine selection of language oriented communities.
And more of these will come in due time: Russian, Italian, Spanish and Chinese.
Bringing in experts
I've read that one of the possible goal of privileging French in FLU is to bring in more experts. That looks like a fallacy to me. Even supposing that these experts would not feel confident in English, they still have the possibility to contribute in French.
Besides, all readers familiar with linguistics books have noticed that when their authors insert citations in such languages as English, German and even Latin or Greek they often omit the corresponding translations, thereby implying that these languages are assumed to be known to their reader.
It is probably worth pointing out that several of our finest experts in French are also English experts. I will name only two:
Inclusive vs Exclusive
Should some kind of French-only policy be enforced, it is doubtless that after a few weeks only native speakers and possibly a handful of enthusiasts would be regular users of the community. Is this what we want?
- Are we so proud of our native tongue that we do not want to share it with other peoples?
- Does French have so many fans all around the world that we can afford to raise the bar on FLU membership?
As a conclusion, I find this proposal misguided.
I understand this question had to be raised at some point but I think we should put final nail in that coffin and move on.